Cutting and rounding-off machine for teeth for clockwork



' F. L W. BUCKMANN.

CUTTING AND HOUNDING OFF MACHINE FOR TEETH FOR CLUGKWORK.

APPLlcATloN FILED 559115, 1918.

1,534 LML Patented May 25,1920.

3 SHEETS-SHEET I.

Figi

ff; v ,9J/@-36 $5 10 ifi@ 25' i6 A y 72 232220 29 d; 6 er 1H llnlllllllllllll lllllnnllll ZV1/mm1? F. L. W. BUCKMANN.

CUTTING AND ROUN'DING OFF MACHINE FOB TEETH FOR CLDCKWORK. APPLICATION FILED SEPT. 5, 1918.

1,341,541 Patented May 25, 1920.

3 SHEETS-SHEET 2- my. z.

F. L. W. BUCKMANN.

CUTTING AND ROUNDING OFF MACHINE FOR TEETH FOR CLOCKWORK. APPLICATION FILED SEPT. 5. 1918.

1,341,541 Patented May 25, 1920.

3 SHEETS-SHEET 3.

STATES ATENT FFME.

FREDERIK Louis winnnivrv Beckmann, or AMSTERDAM, NETHERLANDS.

Application led`septeinber 5. 1918;

To LZZ 'wlwm t may concern:

Be it known that l, Fnnnnnrn Louis l/VILLEM BUCKMANN, mechanician, a sub ject of the Queen of the Netherlands, residing at Amsterdam, in the Province of North Holland, in the Kingdom oit the Netherlands, have invented certain new andA useful improvements in Cuttingand Rounding-Uil" Machines for Teeth for Clockwork, of which the following is a specification.

rlhe invention relates to a machine for cutting and rounding ofi' teeth on'spur and bevel toothed' wheels and pinions'ifor the clockwork and instrument makers trade, and has for its purpose to make this machine of a' very simple and compact construction in order 'that it can be easily handled and can be 'of great convenience and advantage in the `clockwork makers and instrument makers trade.

The invention consists in certain novel features 'of "construction and arrangement of parts hereinafter fully described and pointedout in the claims;

The drawings are as follows:

Figure 1 is av vertical cross section of the machine,

Fig. 2 is a plan.

Fig. 3 is a partialside view taken from the left of Figyl,

Fig. is a side view taken from the right of Fig. 1.

It should be mentioned that the drawings do not show in detail how the machine is fixed to a vise or to a frame. A support '2,

arranged in a U-shaped frame 1, can be moved vertically lup and -down in a dovetail guide 3 by means of a screw 41 with hand crank 5. tween thef legs 1 of the U-shaped"frame a slide 6 which can be moved horizontally backward and forward `over 'a vdove-tail guide 7, 'forming part of the support 2, by means of a screw 8 with hand crank 9. This motion is perpendicular to the guide 3. The slide 6 carries two fixed heads 1() and 11 and these heads support the spindle 12 on which the work, e'. c., one or more round disks in which teeth have to be cut, is fixed.

The spindle 12 rests with one conical end 13 in a center hole 14: at the end of a spindle 15 movable through the fixed head 10. `This spindle 15 is rovided with a filed or planed flat sur ace 16, against which the fiat end of a clamping screw 17 can be screwed in order to fix the spindle Specification of Letters. Patent.

The support carries -be i Patenteddtay 25,1920;

Serialr BT01252387;

in place. The spindle 15 cannot further-A more be drawn out and cannotifall out side# wise on'slightly loosening the screw= as lthe end or the screw 17 offers an obstruction to the shoulder 18 of the flat'v surface 1G.` Unlyonloosening the screwl further can the spindle 15 be wholly drawn out. The otherend 19 of the spindle 12 for the work is also conical and'is centered in a conical boring of a bushQO which canturn in the fixed head 11. ln orderto prevent rotation of the spindle'lQ `relatively to the bush 20 a cylindrical'extension piece' 21 wit-h pro jection is providedon the outer end-19 of the spindle. This projection fits in a groove or slot 23 in the bush 20. `The bush 2O is provided at the 'other end withr an indeXing disk 2% which lies with its boss 25 againstthe fixed head 11. The bushfQO is locked in the vfixed head 11 by means fof a ring 26. The indexing. disk Q-l works `in 'conjunction with an adjustable arm 12T.

rlhis arm has its point of rotation on "a bracket 29 fixed at the point 30 on thefixed head 1l. rThis arm Q'is provided at its 'free end with a slot 3l in which a set pin 32 is placed; This set Vpin is adjustable with respect to ythe arm 27 so that the `pin-can always be inserted accurately in the indexing disk. This is of importance for resetting the wheel to be cut. The arm 27 has moreover a Abroadened part 33 in which a sector slot is cut, the center of which lies at the point of rotation 28. The arm can be fixed at different angles by means of a clamping screw 3d which is inserted through `the slot and screws into thefbracket 279,1

whereby the set pin 32 is made to slider into one of the holes 35 in the indexing disk.` f These holes are arranged to correspondfwith `the number of'teetfh which are required on" the tooth'ed'wheel to be cut:l The insertion of the pin is, with the construction shown, assured in a simple manner by making the arm QT in the form of a spring so that the pin 32 is held pressed in the holes by spring pressure.

Above the spindle 12 for carrying the work there is a horizontal spindle 36 for carrying the tool, for example a milling cutter, and this spindle 36 is arranged with its axis perpendicular to the axis of the spindle 12.

The spindle 36 is support-ed so that it can turn in holes 37, 38 in the inner ends of centering spindles 39 and 10 which can be adjusted and lixed in the upper ends of the legs 41 and 42 of the U-shaped framework 1. This is carried out by means of clamping screws 43 working in conjunction with the hat surfaces 44 on the centering spindles. The centering spindle 40 forms moreover the spindle for a driving pulley 45 which is loose on the spindle and serves to drive the tool spindle V36, for which purpose it is provided with a driving pin 46 which drives a carrier 47 on the spindle 36. The spindle 36 is provided at one end with a screw thread 48 with corresponding nut 49 by means of which the milling cutter can be clamped. vThe cutter is clamped between an enlarged portion 50 of the spindle 36 and a locking sleeve 51. In order to cut the teeth of bevel toothed wheels as well as those of spur toothed wheels the guide 7 of the slide 6 is arranged to turn around an axle 52, pivoted in thesupport 2. The

Vslide can thus be fixed at different angles,

in other words the work spindle l2 can cross the tool spindle at different angles correspending to the required bevel of the teeth. In yorder to iix the guide with slide and accessories in the different angular positions the guide is provided at the end opposite the hinge V52 at both sides with two guide `links 53 and 54, the center of which is at the hinge 52. Clamping screws 55 and 56 pass through these links and screw into the sup- Dort.

l The operation of the machine is as foln lows:

The necessary milling cutter is arranged on the tool spindle and is accurately iixed in one known way or another with its plane in the vertical plane through the axis of the work spindle 12. One or more disks in which the teeth lhave to be cut, are placed on the work spindle. The work spindle 12 is adjusted to the required height by means of the hand crank 5. The milling cutter is now rotated rapidly by the aid of the driving pulley 44 and the work slowly moved forward in a horizontal direction by means of the crank 9. The cutter has thus an opportunity of cutting away locally the material of the disks on the work spindle 12. A slot is thus cut in all the disks placed next to eachA other on the work spindle. After this the pin 32 is brought out of contact with the indexing disk 24 and after the indexing disk has been turned through a certain angle the pin ispla'ced in afollowing hole corresponding to the number of teeth which are required to be cut in the work. In this mannerI the process is continued until all the teeth have been cut.

For the milling of bevel wheels Athe process is the same, with however the exception that the slide 6 must firstbe brought into .i V

the required angular position.

IVhat I claim is: j

1. A machine ofthe character described, comprising a U-shaped frame, a support vertically adjustable-on the frame, a hinged and adjustable guideway carried bythe support and extending between the members of the frame, an adjustable slide mounted in the guideway and having spaced heads, 'a work carrying spindle mounted between the said` heads, a revoluble tool carrying spindle mounted between the upper ends ofthe members of the frame, said spindle being above and at right angles to the work carrying spindle, an indexing member Aoperatively connected with the work carrying spindle, and an adjustable member adapted to engage the indexing member.

2. machine of the character described, i

rso

comprising a U-shaped frame, a support q vertically adjustable on the frame, a hinged and adjustable guideway carried bythe support and extending between the membersot the frame, an adjustable slide mounted in and spring pressed pin for engaging the apertures of the disk.. i

In testimony whereof I have hereunto set my hand.

FREDERIK LOUIS YWILLEllIB|flClIlllAl\ll\l. 

